VV Copper Core PVC Insulated PVC Sheathed Low Voltage Distribution Cable for Indoor Fixed Wiring & Civil General Engineering

VV-type cables are low-voltage power cables featuring copper conductors, PVC insulation, and PVC sheathing. Designed specifically for fixed indoor power transmission, they are suitable for applications that do not require special fire resistance, high-temperature tolerance, or resistance to prolonged outdoor exposure. Their dual-layer PVC composite structure offers balanced basic insulation and physical protection, positioning them as standard copper-core cables for general civil and light industrial power distribution.

• T2-grade annealed, compacted stranded copper conductor: Features low DC resistance and a uniform circular cross-section, ensuring stable current transmission.
• Uniform PVC core insulation: Utilizes PVC compound applied via a calendering process; the insulation layer maintains uniform thickness and rated dielectric strength.
• Water-blocking fiber filler: Fills the gaps between cores to create a circular cable core profile and reduces internal heat accumulation.
• Polyester binding tape: Wraps the entire cable core to prevent insulation damage during installation (e.g., pulling or conduit routing).
• ST1 general-purpose PVC outer sheath: Provides dust resistance, mold resistance, and protection against minor compression; suitable for fully enclosed indoor installation.

Manufactured in strict accordance with GB/T 12706.1 and GB/T 2952 standards; fully compliant with GB 50217 "Code for Design of Electric Power Cables for Civil Buildings" as well as standards for construction supervision and acceptance.

• Standard rating: 0.6/1kV (covers over 99% of indoor power distribution, riser mains, and equipment power supply projects)
• Custom low-voltage specification: 0.3/0.5kV, designed for small control cabinets and low-voltage auxiliary power circuits

• Single-core VV: 1.5mm² – 630mm²
• Multi-core VV: 2/3/4/5 cores and composite configurations (3+1, 3+2, 4+1); cross-section range: 1.5mm² – 400mm²
• Conductor standards: Utilizes 99.90% pure T2 oxygen-free copper; manufactured using a Class 2 compacted stranding process; high-density compaction reduces line resistance and enhances current-carrying capacity

• Long-term continuous operating temperature: 70°C; suitable for standard indoor operating environments
• Short-circuit thermal stability: Withstands instantaneous temperatures of 160°C for 5 seconds without insulation melting or dielectric breakdown
• Minimum static bending radius: 10 times the outer diameter for multi-core VV; 12 times the outer diameter for large-cross-section single-core VV
• Installation temperature requirements: Installation permitted at temperatures above 0°C; pre-heating of the cable is required if the ambient temperature is below 0°C to prevent PVC sheath cracking
• Factory withstand voltage test: Every finished cable undergoes a 3.5kV AC withstand voltage test (duration: 5 minutes) to ensure no insulation breakdown prior to shipment
• Insulation aging performance: Insulation retention rates exceed national standard limits following continuous cyclic aging tests at 70°C, ensuring long-term stable operation

• Small cross-section (1.5 mm² – 10 mm²): Household sockets, corridor lighting, and branch circuits for small equipment.
• Medium cross-section (16 mm² – 185 mm²): Floor-level power distribution feeders and power supply lines for individual production units in workshops.
• Large cross-section (240 mm² – 630 mm²): Main outgoing lines from transformer rooms and cables connecting centralized factory power distribution busbars.

Unlike aluminum-core VLV cables, VV cables utilize pure copper conductors with superior electrical conductivity. For indoor power distribution lines spanning up to 350 meters, voltage drop can be maintained within nationally permitted design limits without increasing the cable cross-section, thereby avoiding the additional material costs otherwise required to compensate for voltage drop. This product is ideally suited for vertical power transmission in high-rise residential buildings and multi-story office complexes.

Featuring an integrated dual-layer PVC insulation and sheathing design, this cable creates a fully sealed barrier that effectively resists indoor dust, damp air in basements, and mold growth. The structure ensures stable performance in environments such as enclosed cable trenches, conduits embedded in walls, compact cable shafts, and indoor cable trays; it retards the aging of the internal insulation layer and extends the cable's total service life.

The multi-core VV cable combines good flexibility with high tensile strength and a small minimum bending radius, facilitating installation in scenarios such as threading through narrow wall conduits, navigating sharp turns, and laying cables in tiered cable trays. Compared to rigid single-core cables, this cable significantly reduces installation time, thereby accelerating electrical installation schedules for both existing building renovations and new construction projects.

Its raw material costs are significantly lower than those of XLPE-insulated YJV cables, while its electrical conductivity stability surpasses that of aluminum-core VLV cables. For projects without requirements for continuous high-load operation or fire emergency power supplies, VV cables strike the optimal balance between initial procurement costs and long-term operational stability, making them the preferred standard wiring solution for budget-conscious conventional civil building designs.

The PVC outer sheath features permanent laser markings (including model, voltage rating, and cross-sectional area), facilitating rapid verification of specifications during supervision and acceptance inspections. The PVC insulation layer strips cleanly without adhering to the copper conductor, thereby accelerating the termination crimping and connection processes and reducing the risk of poor contact caused by residual insulation debris.

VV cables are manufactured using mature, standardized mass production processes; automated extrusion lines precisely control insulation thickness, PVC formulations, and stranding parameters. Deviations in electrical performance between production batches are strictly controlled within industry-permitted tolerances, thereby eliminating the risk of inconsistent current-carrying capacity caused by performance variations in large-scale parallel installation projects.

• Indoor power distribution for residential complexes
• Indoor power supply, public area lighting, standard lighting for underground garages, and auxiliary (non-emergency) circuits for elevator machine rooms
• Internal wiring for commercial and office complexes
• Retail store lighting, branch circuits for office floors, power supply for general supermarket equipment, and feeder lines for non-fire-safety equipment in shopping mall basements
• Internal circuitry for light industrial facilities
• Power supply for standard workshop production equipment, office building power distribution lines, warehouse lighting, and wiring for auxiliary equipment in non-high-temperature environments
• General circuitry for public institutions
• School classroom lighting, daily power supply for hospital ward outlets, public lighting in libraries, and power distribution for administrative office equipment
• Electrical renovation projects for older residential communities
• Replacement of aging indoor cables, outgoing lines from basement distribution boxes, and renewal of wiring in public corridors

1. Case 1: All-Electric Retrofit Project for a 22-Story Residential Complex

   The municipal electrical design institute selected the full range of 0.6/1kV multi-core VV-type cables for all indoor and public power distribution circuits in this project. Compared to the alternative YJV cable option, the total procurement cost was reduced by 31%. Our factory provided comprehensive batch test reports and ampacity reference tables, ensuring the project successfully passed the construction authority's acceptance inspection on the first attempt. The cable's flexible structure effectively solved the challenge of routing cables through narrow wall conduits in the aging building, allowing the complex's electrical upgrade to be completed nine working days ahead of schedule.

2. Case 2: Interior Electrical Fit-out for a Downtown Mixed-Use Office Building

   The general contractor's electrical team selected VV 3×95 and 4×150 medium-cross-section cables for the main power distribution lines on each floor. The cables' dual-layer PVC moisture-resistant structure maintained stable performance in the humid underground equipment levels; after four years of continuous operation, no insulation failures or leakage faults occurred. We provided customized cut-to-length services based on the wiring layout of each floor, eliminating material waste caused by on-site trimming and further optimizing the project's electrical material budget.

3. Case Study 3: Indoor Power Distribution Project for Phase I of the Light Machinery Plant

   Design engineers specified the use of large-cross-section VV 4×185 copper-core cables for the workshop's main power supply trunk line. Leveraging the low electrical resistance of copper, this 280-meter indoor trunk line fully complied with national design limits regarding voltage drop, eliminating the need for additional investment to upgrade the cable cross-section. Our senior electrical engineers assisted the procurement team in preparing technical bid documents that met all tender specifications, thereby enhancing the contractor's overall competitiveness.

• Voltage Rating Matching Rules: Standard 0.6/1kV VV-type cables are used for conventional fixed indoor installations; custom 0.3/0.5kV specification products are selected only for low-power control branch circuits.
• Cross-Section Selection Principles: The required cross-section is calculated based on the total equipment load, incorporating a 10% load margin to accommodate future equipment expansion; unlike aluminum-core VLV cables, there is no need to increase the cross-section size to compensate for material properties.
• Core selection principles: 3-core VV cables are used for single-phase lighting/socket circuits; 4-core cables are used for balanced three-phase trunk lines; and 3+1 or 4+1 composite-core VV cables are selected for equipment requiring independent grounding.
• Application limitations: VV cables have a maximum continuous operating temperature of only 70°C and are unsuitable for high-temperature kiln workshops, boiler rooms, or fire emergency power supply circuits—YJV or NH-YJV series cables should be used in such conditions. Long-term direct-burial installation outdoors is not recommended; aluminum-core VLV cables are preferred for outdoor trunk line projects.

• Conduit protection: Plastic bushings (protective rings) must be installed at conduit ends to prevent sharp metal edges from scratching the PVC outer sheath; sufficient heat dissipation clearance must be reserved when laying multiple cables in a bundle.
• Bending control: Strictly adhere to minimum bending radius specifications; excessive bending can cause permanent creases in the PVC insulation layer, compromising long-term insulation safety.
• Dense installation in cable shafts: A 20% heat dissipation gap should be maintained between stacked VV cables; dense stacking can lead to heat accumulation, thereby reducing actual current-carrying capacity.
• Environmental constraints: Avoid prolonged immersion in strongly acidic or alkaline wastewater; wiring in chemical storage workshops must be isolated and protected using fully enclosed metal conduits.

• Pre-order Qualification Review: Verify that the supplier can provide the production license, certification for Grade T2 copper raw materials, and type test reports for the finished cables.
• On-delivery Spot Checks: Inspect the laser markings on the outer sheath (which must include complete information such as "VV 0.6/1kV + cross-sectional area") and check the surface finish of the copper cores and the uniformity of the insulation layer thickness. For government tender projects, if required by the supervising entity, samples must be taken for third-party re-testing of withstand voltage.
• Supply Schedule Planning: For bulk orders related to large- or medium-sized commercial projects or factory renovation works, orders should be placed 6 to 11 working days in advance. This allows sufficient time for production and batch inspection, thereby preventing construction stoppages caused by supply shortages.

• Adherence to National Standards: The entire VV cable series is manufactured in strict accordance with the GB/T 12706.1 standard, fully complying with national regulations for the electrical design, construction, and acceptance of civil buildings, and meeting the audit requirements of engineering quality supervision authorities.
• Complete Batch Documentation Provided: Includes factory inspection reports, copper quality certificates, packing lists, special VAT invoices, and technical parameter compliance sheets for tenders, offering one-stop documentation support for project filing and formal acceptance.
• Authoritative Third-Party Certification: Products have passed inspections by nationally recognized electrical testing agencies; official test reports are available for submission to construction authorities and supervisory bodies for filing and review.
• Batch Quality Consistency Control: Standardized use of T2-grade copper ingots and fixed PVC formulations across all production batches ensures stable electrical performance and eliminates the risk of acceptance failure caused by quality variations between batches.

• Extensive Specification Range: The VV cable lineup covers a full spectrum of products, ranging from small-cross-section branch cables (1.5mm²) to large-cross-section single-core trunk cables (630mm²); ample stock of standard specifications ensures rapid delivery. Services include customization of composite core structures, cut-to-length processing, and printing of project-specific markings on outer sheaths, enabling one-stop centralized procurement of indoor copper cables without the need to coordinate with multiple suppliers.

• We utilize only high-quality T2 virgin copper ingots (avoiding recycled mixed scrap) and pair them with renowned brands of PVC insulation and sheathing materials. A three-tier inspection process—comprising incoming raw material testing, real-time in-line monitoring of semi-finished products, and voltage withstand sampling tests on finished cables—effectively eliminates defects such as excessively thin insulation, copper core impurities, and brittle outer sheaths often found in products from smaller manufacturers.

• By bypassing intermediary distributors, we eliminate markup costs and offer tiered pricing discounts based on order volume for large-scale engineering projects. Our in-house electrical engineers provide complimentary load calculations and conductor cross-section optimization, helping clients select the most cost-effective cable specifications that fully comply with design standards, thereby minimizing total expenditure on electrical materials.

• Our senior cable engineers provide end-to-end technical services to design institutes and general contractors, including consultation on indoor power distribution circuit design, downloadable reference tables for VV cable current-carrying capacity, optimization of on-site installation plans, and assistance in clarifying technical specifications for tenders. For large-scale commercial and industrial facility projects, we assist in preparing specification compliance tables that meet tender requirements, thereby enhancing the contractor's overall competitiveness.

• Multiple automated continuous extrusion lines enable high daily production volumes for VV cables, backed by substantial raw material inventories. Even for large-scale bulk orders—such as those for community renovations or industrial facility infrastructure—we ensure delivery strictly according to schedule, effectively mitigating the risk of construction delays caused by supply chain shortages.

• All delivered VV cables come with a 10-year manufacturer's quality warranty. Our technical team provides remote video guidance within 24 hours to address technical issues arising at construction sites; for long-term partner general contractors and design institutes, we can arrange on-site technical services upon request. We maintain dedicated profiles for high-volume, long-term clients and pre-stock inventory based on project schedules, thereby shortening delivery times for subsequent orders.

VV copper-core, PVC-insulated low-voltage power cables serve as a standard, foundational wiring solution for fixed power distribution circuits in residential complexes, commercial complexes, light industrial facilities, and public service infrastructure. Featuring high-conductivity copper cores, installation-friendly flexibility, a dust- and moisture-resistant dual-layer PVC sheath, and full compliance with national standards, this product perfectly meets the core requirements of electrical designers and procurement managers: ensuring the long-term, stable operation of indoor power supply systems while effectively controlling project material costs.

As a fully certified specialist manufacturer of VV cables, we provide an integrated solution combining standardized cable supply, comprehensive documentation for project acceptance, and professional technical consulting. We serve global electrical design institutes, general contractors, and large-scale project procurers, helping ensure the successful official acceptance of indoor power distribution projects while optimizing lifecycle operational costs for power distribution circuits.